A) \[X={{[Au{{(CN)}_{2}}]}^{-}},\,Y={{[Zn{{(CN)}_{4}}]}^{2-}}\]
B) \[X={{[Au{{(CN)}_{4}}]}^{3-}},\,Y={{[Zn{{(CN)}_{4}}]}^{2-}}\]
C) \[X={{[Au{{(CN)}_{2}}]}^{-}},\,Y=Zn{{(CN)}_{6}}{{]}^{4-}}\]
D) \[X={{[Au{{(CN)}_{4}}]}^{-}},\,Y={{[Zn{{(CN)}_{4}}]}^{2-}}\]
Correct Answer: A
Solution :
\[\underset{\text{gold ore}}{\mathop{\text{Roasted}}}\,+C{{N}^{-}}+{{H}_{2}}O\xrightarrow{{{O}_{2}}}\,{{[Au\,{{(CN)}_{2}}]}^{-}}+O{{H}^{-}}\] \[{{\left[ Au\,{{(CN)}_{2}} \right]}^{\,-}}+Zn\to {{\left[ Zn\,{{(CN)}_{4}} \right]}^{\,2-}}\].You need to login to perform this action.
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